floater caused by Weiss ring
Conditions
Interventions
YAG laservitreolysis
sham YAG laser
Sponsors
The Study Group for Laser Vitreolysis
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1) at least 6 month of symptom associated with floaters 2) posterior vitreous detachment confirmed by clinical examination, OCT and ultrasound B scan 3) more than 4 on the score of visual disturbance due to floaters (0 = no symptom, 10 = intolerable) 4) Weiss ring more than 3 mm away from the retina and 5 mm away from the lens not applicable if pseudophakic patients) by B scan 5) able to take position for YAG laser 6) understands the risk of YAG laser resulting in retinal detachment, intraocular hemorrhage, retinal injury, cataract formation, optic disc injury, inflammation, and other events causing visual disturbance 7) willing to cooperate to the study protocol 8) only one eye for the study even if the patient had symptom in both eye 9) willing to sign informed consent
Exclusion criteria
Exclusion criteria: 1) fellow eye with best corrected visual acuity bellow 0.4(20/50) 2) history of retinal break, retinal detachment, uveitis in the study eye 3) history of diabetic retinopathy, macular edema, retinal vein occlusion, or aphakia in the study eye 4) ongoing treatment of glaucoma or ocular hypertension by more than 2 kinds of glaucoma topical medication, history of glaucoma surgery in the study eye
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Subjective change measured by visual questionnaire | — |
Secondary
| Measure | Time frame |
|---|---|
| a) visual acuity b) ultrasound B scan c) optical coherence tomography; OCT d) fundus photo image e) slit lamp examination, indirect ophthalmoscope,intra ocular pressure f) National Eye Institute Visual Functioning Questionnaire 25(VFQ-25) | — |
Countries
Japan
Contacts
Public ContactKeiko Misawa
The Study Group for Laser Vitreolysis Secretariat
Outcome results
None listed